0600900 - ÚEM 2025 RIV CH eng J - Článek v odborném periodiku
Hejčl, Aleš - Brunátová, J. - Švihlová, H. - Víteček, Jan - Wunschova, A. V. - Sejkorová, A. - Hundža Stratilová, M. - Radovnický, T. - Sameš, M. - Hron, J.
Rupture point is associated with divergent hemodynamics in intracranial aneurysms.
Frontiers in Neurology. Roč. 15, May (2024), č. článku 1364105. ISSN 1664-2295. E-ISSN 1664-2295
Grant CEP: GA MZd(CZ) NU22-08-00124
Institucionální podpora: RVO:68378041 ; RVO:68081707
Klíčová slova: intracranial aneurysm * computational fluid dynamics * rupture * particle image velocimetry (PIV) * wall shear stress (WSS)
Obor OECD: Biophysics
Impakt faktor: 2.7, rok: 2023 ; AIS: 0.928, rok: 2023
Způsob publikování: Open access
Web výsledku:
https://www.frontiersin.org/journals/neurology/articles/10.3389/fneur.2024.1364105/fullDOI: https://doi.org/10.3389/fneur.2024.1364105

Background: Understanding the risk factors leading to intracranial aneurysm (IA) rupture have still not been fully clarified. They are vital for proper medical guidance of patients harboring unruptured IAs. Clarifying the hemodynamics associated with the point of rupture could help could provide useful information about some of the risk factors. Thus far, few studies have studied this issue with often diverging conclusions.
Methods: We identified a point of rupture in patients operated for an IAs during surgery, using a combination of preoperative computed tomography (CT) and computed tomography angiography (CTA). Hemodynamic parameters were calculated both for the aneurysm sac as a whole and the point of rupture. In two cases, the results of CFD were compared with those of the experiment using particle image velocimetry (PIV).
Results: We were able to identify 6 aneurysms with a well-demarcated point of rupture. In four aneurysms, the rupture point was near the vortex with low wall shear stress (WSS) and high oscillatory shear index (OSI). In one case, the rupture point was in the flow jet with high WSS. In the last case, the rupture point was in the significant bleb and no specific hemodynamic parameters were found. The CFD results were verified in the PIV part of the study.
Conclusion: Our study shows that different hemodynamic scenarios are associated with the site of IA rupture. The numerical simulations were confirmed by laboratory models. This study further supports the hypothesis that various pathological pathways may lead to aneurysm wall damage resulting in its rupture.
Trvalý link: https://hdl.handle.net/11104/0358175